const str='hello'
const num=1231231
const flag=true
const u=undefined
const n=null

const s=Symbol(1)
const s2=Symbol(1)

const array=['a',1,'c',2,'e']
const obj={
    name:'罗总',
    age:18,
    like:['running','rap'],
    info:{
        city:'南昌',
        girfriend:3
    }  
}
const obj2=new Object()

class Persion{
    
}